Have added an interesting one to the wiki - DUB-LHR-HEL/HEL-LHR. 200TPs for £374, can leave DUB on Saturday lunchtime and return Sunday evening. Only £38 more for straight LHR-HEL return, but obviously 40 fewer TPS (and a schlep across London for those of us in the east - much more sensible to use LCY for positioning flight!). Can’t see an end date, just a good advance purchase fare it seems
with IHG pointsbreaks having a few Helsinki options it can be quite cost effective, or use it as an opportunity to hit the brand / country targets for IHG Accelerate